Packing of helices: Is chirality the highest crystallographic symmetry?

Romain Gautier; Kenneth R. Poeppelmeier

doi:10.3390/cryst6090106

Packing of helices: Is chirality the highest crystallographic symmetry?

Romain Gautier^*, Kenneth R. Poeppelmeier

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Chiral structures resulting from the packing of helices are common in biological and synthetic materials. Herein, we analyze the noncentrosymmetry (NCS) in such systems using crystallographic considerations. A comparison of the chiral structures built from helices shows that the chirality can be expected for specific building units such as 3₁/3₂ or 6₁/6₅ helices which, in hexagonal arrangement, will more likely lead to a chiral resolution. In these two systems, we show that the highest crystallographic symmetry (i.e., the symmetry which can describe the crystal structure from the smallest assymetric unit) is chiral. As an illustration, we present the synthesis of two materials ([Zn(2,2'-bpy)₃](NbF₆)₂ and [Zn(2,2'-bpy)₃](TaF₆)₂) in which the 3_n helices pack into a chiral structure.

Original language	English (US)
Article number	106
Journal	Crystals
Volume	6
Issue number	9
DOIs	https://doi.org/10.3390/cryst6090106
State	Published - Sep 1 2016

Keywords

Chirality
Crystallography
Helical system
Oxide-fluorides

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Condensed Matter Physics
Inorganic Chemistry

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10.3390/cryst6090106

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title = "Packing of helices: Is chirality the highest crystallographic symmetry?",

abstract = "Chiral structures resulting from the packing of helices are common in biological and synthetic materials. Herein, we analyze the noncentrosymmetry (NCS) in such systems using crystallographic considerations. A comparison of the chiral structures built from helices shows that the chirality can be expected for specific building units such as 31/32 or 61/65 helices which, in hexagonal arrangement, will more likely lead to a chiral resolution. In these two systems, we show that the highest crystallographic symmetry (i.e., the symmetry which can describe the crystal structure from the smallest assymetric unit) is chiral. As an illustration, we present the synthesis of two materials ([Zn(2,2'-bpy)3](NbF6)2 and [Zn(2,2'-bpy)3](TaF6)2) in which the 3n helices pack into a chiral structure.",

keywords = "Chirality, Crystallography, Helical system, Oxide-fluorides",

author = "Romain Gautier and Poeppelmeier, {Kenneth R.}",

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T2 - Is chirality the highest crystallographic symmetry?

AU - Gautier, Romain

AU - Poeppelmeier, Kenneth R.

PY - 2016/9/1

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N2 - Chiral structures resulting from the packing of helices are common in biological and synthetic materials. Herein, we analyze the noncentrosymmetry (NCS) in such systems using crystallographic considerations. A comparison of the chiral structures built from helices shows that the chirality can be expected for specific building units such as 31/32 or 61/65 helices which, in hexagonal arrangement, will more likely lead to a chiral resolution. In these two systems, we show that the highest crystallographic symmetry (i.e., the symmetry which can describe the crystal structure from the smallest assymetric unit) is chiral. As an illustration, we present the synthesis of two materials ([Zn(2,2'-bpy)3](NbF6)2 and [Zn(2,2'-bpy)3](TaF6)2) in which the 3n helices pack into a chiral structure.

AB - Chiral structures resulting from the packing of helices are common in biological and synthetic materials. Herein, we analyze the noncentrosymmetry (NCS) in such systems using crystallographic considerations. A comparison of the chiral structures built from helices shows that the chirality can be expected for specific building units such as 31/32 or 61/65 helices which, in hexagonal arrangement, will more likely lead to a chiral resolution. In these two systems, we show that the highest crystallographic symmetry (i.e., the symmetry which can describe the crystal structure from the smallest assymetric unit) is chiral. As an illustration, we present the synthesis of two materials ([Zn(2,2'-bpy)3](NbF6)2 and [Zn(2,2'-bpy)3](TaF6)2) in which the 3n helices pack into a chiral structure.

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KW - Crystallography

KW - Helical system

KW - Oxide-fluorides

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